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Sony CDX-838 Service Manual

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3 7 63 1515 0
SERVICE MANUAL
TE
L 13942296513
www
.
MICROFILM
http://www.xiaoyu163.com
x
ao
u163
y
i
http://www.xiaoyu163.com
CDX-838
2 9
8
Model Name Using Similar Mechanism
CD Drive Mechanism Type
Optical Pick-up Name
Q Q
SPECIFICATIONS
3
6 7
1 3
1 5
COMPACT DISC CHANGER
co
.
9 4
2 8
US Model
Canadian Model
E Model
NEW
MG-250D-137
KSS-521A/J2N
0 5
8
2 9
9 4
2 8
m
9 9
9 9

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Summary of Contents for Sony CDX-838

  • Page 1 CDX-838 3 7 63 1515 0 SERVICE MANUAL US Model Canadian Model E Model Model Name Using Similar Mechanism CD Drive Mechanism Type MG-250D-137 Optical Pick-up Name KSS-521A/J2N SPECIFICATIONS L 13942296513 COMPACT DISC CHANGER u163 MICROFILM http://www.xiaoyu163.com...

  • Page 2: Table Of Contents

    SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PIÈCES SONY DONT LES Magazine ass’y NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

  • Page 3: General

    http://www.xiaoyu163.com SECTION 2 This section is extracted from instruction manual. GENERAL 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 4: Installation

    http://www.xiaoyu163.com 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 5: Connections

    http://www.xiaoyu163.com 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 6: Disassembly

    http://www.xiaoyu163.com SECTION 3 DISASSEMBLY 3 7 63 1515 0 Note: Follow the disassembly procedure in the numerical order given. COVER (UPPER.T) , FRONT PANEL (T) ASS’Y 1 screw 2 screw (PTT2.6 × 6) (BVTT2.6 × 6) 3 cover (upper.T) 4 lever (FL T) 1 screw 1 screw (PTT2.6 ×...
  • Page 7 http://www.xiaoyu163.com 3 7 63 1515 0 JACK BOARD, DIGITAL OUT BOARD 2 connector (CN902) 5 connector (CN801) Remove the jack board in the direction of the arrow. 1 ground point screw (PTT2.6 × 6) 3 jack board 6 digital out board 4 screw (BVTT2 ×...
  • Page 8 http://www.xiaoyu163.com 3 7 63 1515 0 ELEVATOR MOTOR ASS’Y (M104) 1 screw (PTT2 × 3) 2 bracket (EVM) 3 elevator motor ass’y (M104) L 13942296513 ESCUTCHEON (T) 3 two claws 2 Remove the claw in the direction of the arrow A . 4 Remove the ditch in the direction of the arrow B .
  • Page 9 http://www.xiaoyu163.com 3 7 63 1515 0 CASE (UPPER) ASS’Y 3 Remove the edge in the direction of the arrow A . 1 three screws (PTT2 × 4) 1 two screws (PTT2 × 4) 4 Remove the case (upper) ass’y in the direction of the arrow B .
  • Page 10 http://www.xiaoyu163.com 3 7 63 1515 0 RF BOARD 1 OP flexible board 3 two screws (CNJ11) (PS2 × 4) 3 two screws (PS2 × 4) 7 RF board 5 connector (CNP53) 2 Break the soldering 6 Break the soldering L 13942296513 of motor (M102) lead.
  • Page 11 http://www.xiaoyu163.com 3 7 63 1515 0 SW BOARD, SPINDLE MOTOR ASS’Y (M101) 8 two screws (P1.7 × 2.2) 3 spring (chucking) 6 retainer (disc) 1 screw (P2 × 2.2) 4 screw (P2 × 2.2) 5 bracket (CP) 9 Remove the spindle motor ass’y (M101) 2 SW board in the direction of the arrow.

  • Page 12: Mechanism Deck Assembly

    http://www.xiaoyu163.com SECTION 4 MECHANISM DECK ASSEMBLY 3 7 63 1515 0 Note: Follow the assembly procedure in the numerical order given. OPTICAL PICK-UP COMPLETE ASS’Y 1 Move the lever (LOCK 3) in direction A , and return it a little in direction B from the position where the chuck plate is moved chuck plate down to the lower limit.
  • Page 13 http://www.xiaoyu163.com 3 7 63 1515 0 OPERATION CHECK 1 Confirm that the slider moves in direction C to move down the chuck plate if the gear (LOAD CAM) is rotated in direction A or the chuck plate moves up and the slider moves in direction D if the gear is rotated in direction B .

  • Page 14: Mechanical Adjustments

    7. After adjustment at addresses 5 to 6 is finished, check all op- erations from addresses 1 to 10 with the set placed vertically and horizontally respectively to confirm that the elevator shaft CDX-838 positions in a range between comb teeth A to B. L 13942296513...

  • Page 15: Electrical Adjustments

    http://www.xiaoyu163.com SECTION 6 ELECTRICAL ADJUSTMENTS 3 7 6 3 1 5 1 5 0 Note: • TRACKING OFFSET CHECK • FOCUS GAIN ADJUSTMENT • When gain is lowered... 1. Perform adjustments as given. (COARSE ADJUSTMENT) The set does not play because of no focus operation. 2.

  • Page 16: Diagrams

    CDX-838 SECTION 7 DIAGRAMS 3 7 6 3 1 5 1 5 0 7-1. BLOCK DIAGRAM – SERVO Section – DATA, PCMD, BCK, LRCK, WDCK D.OUT DATA DIGITAL DIGITAL SIGNAL PROCESSOR, FILTER (Page 17) CLV SERVO IC101 PD1 I-V AMP...

  • Page 17: Block Diagram - Main Section

    CDX-838 3 7 6 3 1 5 1 5 0 7-2. 7-2. BLOCK DIAGRAM – MAIN Section – BLOCK DIAGRAM – MAIN Section – OPTICAL IC801 TRANSCEIVER DIGITAL OUT IC801 D-RAM CONTROLLER D/A CONVERTER IC601 IC401 CN901 (1/2) ANALOG OUT...

  • Page 18: Block Diagram - Bus Control/Power Supply Section

    MAGAZINE IN/OUT MAG.SW DETECT LOW-PASS FILTER REGULATOR (IC602) B+ IC306 CD.ON BU.CHK DAC +5V REGULATOR IC307 BUS INTERFACE D313 (FOR SONY BUS) B+ SWITCH ELEVATOR MOTOR DRIVE SERVO +5V REGULATOR B.UP IC302 Q305 IC301 IC305 DATA OUT1 ELV.R ELEVATOR M104...

  • Page 19: Note For Printed Wiring Boards And Schematic Diagrams

    http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 • Circuit Boards Location 7-4. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS Note on Printed Wiring Board: Note on Schematic Diagram: • X : parts extracted from the component side. •...

  • Page 20: Printed Wiring Boards - Rf/Sw Boards

    CDX-838 7-5. PRINTED WIRING BOARDS – RF/SW Boards – • See page 19 for Circuit Boards Location. 3 7 6 3 1 5 1 5 0 RF BOARD (COMPONENT SIDE) RF BOARD (CONDUCTOR SIDE) • Semiconductor Location Ref. No. Location...

  • Page 21: Schematic Diagram - Rf/Sw Boards

    CDX-838 3 7 6 3 1 5 1 5 0 7-6. SCHEMATIC DIAGRAM – RF/SW Boards – • See page 27 for Waveforms. • See page 30 for IC Block Diagrams. (Page 24) 1 3 9 4 2 2 9 6 5 1 3...

  • Page 22: Printed Wiring Boards - Main Board (Component Side)

    CDX-838 3 7 6 3 1 5 1 5 0 7-7. PRINTED WIRING BOARDS – MAIN Board (Component Side) – • See page 19 for Circuit Boards Location. • Semiconductor Location (Component Side) MAIN BOARD (COMPONENT SIDE) Ref. No.

  • Page 23: Main Board (Conductor Side)

    CDX-838 3 7 6 3 1 5 1 5 0 7-8. PRINTED WIRING BOARD – MAIN Board (Conductor Side) – • See page 19 for Circuit Boards Location. • Semiconductor Location (Conductor Side) MAIN BOARD (CONDUCTOR SIDE) Ref. No.

  • Page 24: Schematic Diagram - Main Board (1/3)

    CDX-838 3 7 6 3 1 5 1 5 0 7-9. SCHEMATIC DIAGRAM – MAIN Board (1/3) – • See page 27 for Waveforms. • See page 30 for IC Block Diagrams. (Page 1 3 9 4 2 2 9 6 5 1 3...

  • Page 25: Schematic Diagram - Main Board (2/3)

    CDX-838 3 7 6 3 1 5 1 5 0 7-10. SCHEMATIC DIAGRAM – MAIN Board (2/3) – • See page 27 for Waveforms. • See page 31 for IC Block Diagrams. (Page 29) 1 3 9 4 2 2 9 6 5 1 3...

  • Page 26: Schematic Diagram - Main Board (3/3)

    CDX-838 3 7 6 3 1 5 1 5 0 7-11. SCHEMATIC DIAGRAM – MAIN Board (3/3) – • See page 27 for Waveforms. • See page 31 for IC Block Diagrams. (Page 24) (Page 25) 1 3 9 4 2 2 9 6 5 1 3...

  • Page 27: Tel 13942296513

    http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 • Waveforms – RF Board – – MAIN Board (1/3) – – MAIN Board (2/3) – – MAIN Board (3/3) – 1 IC11 ed (RF O) (CD PLAY) 500 mV/DIV, 500 ns/DIV 6 IC101 ys (RFCK) qa IC603 4 w;...

  • Page 28: Printed Wiring Boards - Digital Out/Jack Boards

    7-12. PRINTED WIRING BOARDS – DIGITAL OUT/JACK Boards – • See page 19 for Circuit Boards Location. JACK BOARD (COMPONENT SIDE) JACK BOARD (CONDUCTOR SIDE) C902 CONTROL C901 (FOR SONY BUS) CN902 CN903 IC901 FB903 JACK FLEXIBLE BOARD CN901 1-664-796- FB901...

  • Page 29: Schematic Diagram - Digital Out/Jack Boards

    CDX-838 3 7 6 3 1 5 1 5 0 7-13. SCHEMATIC DIAGRAM – DIGITAL OUT/JACK Boards – (Page 25) 1 3 9 4 2 2 9 6 5 1 3 w w w u 1 6 3 http://www.xiaoyu163.com...
  • Page 30 http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 IC51 BA6297AFP • IC Block Diagrams – RF Board – IC11 CXA1992BR 24 23 17 16 – 33 32 31 30 – – PD 2 PD 1 I-V AMP I-V AMP RF SUMMING T.S.D MUTE...
  • Page 31 http://www.xiaoyu163.com 3 7 63 1515 0 IC202 BR24C16FJ-E2 IC301 BA6287F OUT1 START STOP LOGIC SERIAL CONTROL H.V. PUMP/TIMING LOGIC OUT2 8 VCC LOAD COMP DEVICE DATA RECOVERY DRIVER DRIVER ADDRESS COMPARATOR LOAD INC DATA WORD PROM ADDR/COUNTER VREF CONTROL LOGIC Y DEC SERIAL MUX POWER...
  • Page 32 http://www.xiaoyu163.com 3 7 63 1515 0 IC402 MSM514400D-60TS-K WRITE DATA INPUT DATA OUTPUT CLOCK BUFFER BUFFER GENERATOR CLOCK GENERATOR 4M BIT COLUMN SENSE AMP MEMORY DECODER I/O GATE CELL BOARD CLOCK BIAS GENERATOR DECODER GENERATOR REFRESH MODE ADDRESS PRE- ADDRESS CONTROL BUFFER DECODER...

  • Page 33: Ic Pin Function Description

    ESPXLT ESP latch pulse signal output to the CXD2522Q (IC401) “L” active System reset signal input from the SONY bus interface (IC302) and reset signal generator (IC304) “L”: reset For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”...
  • Page 34 Not used (open) C.OUT Track number count signal input from the CXA1992BR (IC11) BUS.ON Bus on/off control signal input from the SONY bus interface (IC302) “H”: bus on A/D.SW Analog/digital select switch (SW801) input terminal “L”: digital, “H”: analog MGLK Magazine eject operation completion detect switch (SW201) input “L”: magazine detected...
  • Page 35 DATA0 to DATA7 Two-way data bus with the S-RAM (IC502) System reset signal input from the system controller (IC201), SONY bus interface (IC302) and reset signal generator (IC304) “L”: reset For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”...

  • Page 36: Exploded Views

    http://www.xiaoyu163.com SECTION 8 EXPLODED VIEWS 3 7 63 1515 0 NOTE: • Items marked “*” are not stocked since they • -XX and -X mean standardized parts, so they The components identified by mark 0 or dotted line with mark may have some difference from the original are seldom required for routine service.
  • Page 37 http://www.xiaoyu163.com 3 7 63 1515 0 (2) MECHANISM DECK SECTION-1 (MG-250D-137) L 13942296513 u163 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-3375-497-1 CHASSIS (U) SUB ASSY 3-011-997-01 SPRING (STOPPER. LOWER) 3-024-161-01 SPRING (SUT) http://www.xiaoyu163.com...
  • Page 38 http://www.xiaoyu163.com 3 7 63 1515 0 (3) MECHANISM DECK SECTION-2 (MG-250D-137) M104 L 13942296513 u163 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-024-170-01 SPRING (SB), TENSION X-3378-136-1 CHASSIS (D. D) SUB ASSY * 102 3-024-172-01 BRACKET (EVM) M104 A-3301-123-A ELJ MOTOR ASSY (ELEVATOR) http://www.xiaoyu163.com...
  • Page 39 http://www.xiaoyu163.com 3 7 63 1515 0 (4) MECHANISM DECK SECTION-3 (MG-250D-137) L 13942296513 M103 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 151 3-024-150-01 RETAINER (CHM) 3-010-252-01 ROLLER (CRE) * 152 X-3378-080-1 BRACKET (CHM. D) ASSY 3-010-268-01 SPRING (DH), TENSION 3-010-270-01 COVER (CHM) * 161...
  • Page 40 http://www.xiaoyu163.com 3 7 63 1515 0 (5) MECHANISM DECK SECTION-4 (MG-250D-137) not supplied L 13942296513 M101 not supplied M102 The components identified by Les composants identifiés par une mark 0 or dotted line with marque 0 sont critiques pour la mark 0 are critical for safety.

  • Page 41: Electrical Parts List

    http://www.xiaoyu163.com DIGITAL OUT SECTION 9 3 7 63 1515 0 ELECTRICAL PARTS LIST JACK MAIN NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark 0 or dotted line with mark parts list may be different from the parts speci- are seldom required for routine service.
  • Page 42 http://www.xiaoyu163.com MAIN 3 7 63 1515 0 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C316 1-135-605-21 ELECT 1000uF < FERRITE BEAD > C317 1-115-651-11 ELECT 100uF FB402 1-500-445-21 FERRITE C318 1-135-612-61 ELECT 100uF FB403 1-500-445-21 FERRITE C319 1-135-613-61 ELECT 47uF...
  • Page 43 http://www.xiaoyu163.com MAIN 3 7 63 1515 0 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R111 1-216-049-11 RES-CHIP 1/10W < SWITCH > R114 1-216-049-11 RES-CHIP 1/10W R201 1-216-089-00 RES-CHIP 1/10W SW201 1-771-540-11 SWITCH, PUSH (1 KEY) (MAGAZINE DETECT) R202 1-216-089-00 RES-CHIP 1/10W...
  • Page 44 http://www.xiaoyu163.com 3 7 63 1515 0 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < CONNECTOR > 1-216-073-00 METAL CHIP 1/10W 1-216-085-00 METAL CHIP 1/10W CNJ11 1-778-776-21 CONNECTOR, FPC 17P CNJ12 1-778-777-21 CONNECTOR, FPC 26P 1-216-073-00 METAL CHIP 1/10W * CNP53 1-580-055-21 PIN, CONNECTOR (SMD) 2P...
  • Page 45 http://www.xiaoyu163.com 3 7 63 1515 0 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark ACCESSORIES & PACKING MATERIALS ******************************* 3-867-909-11 MANUAL, INSTRUCTION (ENGLISH, FRENCH, SPANISH, CHINESE) A-3291-950-C MAGAZINE (250T) ASSY ************************************************************ PARTS FOR INSTALLATION AND CONNECTIONS ************************************** 3-040-583-21 BRACKET * 502...
  • Page 46 CDX-838 3 7 63 1515 0 L 13942296513 u163 Sony Corporation 9-870-026-11 99L057035-1 Mobile Electronics Division Company Printed in Singapore C 1999. 12 Published by General Engineering Dept. http://www.xiaoyu163.com...

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